This truly is the stuff of nightmares. Martin Shkreli – aka. America’s most hated man – has attempted to diss Wu-Tang’s Ghostface Killah in a painfully insane new video.

The pharmaceutical boss, who dropped $2 million on the group’s one-of-a-kind Once Upon A Time In Shaolin album last year, recorded the clip as a reaction to Ghostface calling him a “shithead” with a “Michael Jackson nose”. 

“You're not a Ghost Killah, I'm sorry,” says Shkreli, in the TMZ-obtained clip. “You think it's OK to beef with me. But that's a big mistake... You're an old man that's lost his relevance, and you're trying to claim the spotlight from my spotlight. That's not going to work.”

Flanked by three ~intimidating masked men, the accused fraudster then goes on to address Ghostface by his “government name”, Dennis Coles – before threatening to “erase” him from the “record book of rap”.

“If you ever say some dumb shit again, this album, this Shaolin, I'm going to erase all your shit from this album, you understand?” he scoffs, while cradling a glass of red wine. “I'm going to erase you from the record book of rap.”

“Without me, you're nothing. So don't ever mention my name again, or there'll be more of a price to pay than this video... You think you're the only tough guy from New York City?”

This absolute joke is only the latest stunt from Shkreli, who attracted widespread revulsion last summer for hiking up the price of HIV treatment by 5,500 per cent. Now under investigation for security fraud, he’s seen as one of The Worst People In The World – a fact he gladly admitted to in a recent profile with Vice. “I'm not just the heel of the music world," he explained. "I want to be the world's heel.” For those that aren’t already aware, “heels” are the “bad guys” in pro-wrestling – so it seems like he’s doing a pretty good job so far. 

Watch the full clip on TMZ by clicking here